 (def rand-force-unit (rand-unit :force))
 (def rand-length-unit (rand-unit :length))
 (def rand-mass-unit (rand-unit :mass))
+(def rand-power-unit (rand-unit :power))
 (def rand-pressure-unit (rand-unit :pressure))
 (def rand-proppant-concentration-unit (rand-unit :proppant-concentration))
 (def rand-slurry-rate-unit (rand-unit :slurry-rate))

                            :force                  [:lbf :N]
                            :length                 [:ft :m]
                            :mass                   [:lb :kg]
                            :pressure               [:psi :kPa]
                            :proppant-concentration [:lb-per-gal :lb/gal :kg-per-m3 :kg/m3]
                            :slurry-rate            [:bbl-per-min :bpm :m3-per-min :m3/min]

                          :force
                          :length
                          :mass
                          :power
                          :pressure
                          :proppant-concentration
                          :slurry-rate
